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Finding the Fourth Proportional to 334.38, 505.20 and 331.50

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Solution

The fourth proportional to 334.38, 505.20 and 331.50 is: 500.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.38 : 505.20 = 331.50 : x
  2. Step 2: Convert to fraction form
    334.38/505.20 = 331.50/x
  3. Step 3: Cross multiply
    334.38x = 505.20 × 331.50
  4. Step 4: Simplify right side
    334.38x = 167,473.80
  5. Step 5: Solve for x
    x = 167,473.80/334.38
  6. Step 6: Final answer
    x = 500.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.